I love this gun. It was about the most accurate gun i have every shot and right out of the box it was shooting field level (300 fps), and it looked like an M16. All my friends were like "oh my gosh! its awesome!" It really could shoot somebody from easily 50 feet. It did come with some essentials like the stock and feed neck. I recommend getting a new feed neck that isn't purple... (lol) Other than that it's an awesome gun. Has full auto (13 bps), burst (around 15 my guess) and semi which is clocked at... 25 BPS!!!!!! It's VERY easy to walk too... i was walking around 16 bps. The main thing your going to want to get is going to be a remote coil because it hurts your arms after a while... Anyway, a good hopper capable of at least 15 BPS. Sound activated ones are nice, but aren't very fast. Anyway... lets talk about the air conservation and battery length.

Air conservation - I probably got off around 600 - 800 shots with a 12 ounce tank!

Battery - I got this gun monday. I was playing around with it in my room like shooting it with no air or balls on it A LOT all the way until saturday. I was thinking i needed a new battery. NOPE I played for 3 hours and didn't even need a new battery and it still works now. It's amazing.

Awesome gun and I really recommend it for scenario, woodsball or people who want an interesting type of gun!!! But i did learn this if anything while playing. MY friend got 4 kills (with help on 2 of them) And he was using a semi auto triton 2. I got only 1 - 2 kills and I was using a 200 dollar MR2, so just remember it's not the gun it's the gunner.
HAVE FUN WITH YOUR NEW GUN ( if you get it... :P)

EDIT)(*&^%$#@! I GOT 7 kill with this gun on saturday. I was owning. i really love this gun. it is light after you play with it a little while. IT IS VERY EASY TO CHANGE MODES> It is very easy to cock. I was chopping then cocking in less than 2 seconds. It is really nice. GET THIS GUN IF YOU ARE STRONG AND YOU LOVE SCENARIO GUNS . you may not be able to upgrade it as much as a tippmann 98 or a-5, but the mr2 is a big gun. It can be turned into a ak-47, m 16, halo battle rifle... sort of lol and you (with a little imagination) can make it into an mp5. ITS NOT THAT BAD>>>>>>>>>>>>>>& amp; amp; gt;>>>>>>>>>>>>> JUST GET IT ITS AWESOME

EDIT**** down to a 9. the little switch is vibrating off so i can only do semi. using my q loaders i cant do full auto and 3 shot. I guess i can glue it but because it does that i am gonna have to take it down to a 9. ALso because it is a little heavy after a while. But i dont feel it any more. lol i got 6 -7 kills today lol. i love this GUN

Conclusion:

Take care of your new little.. umm.. big .. puppy... it's gonna be a bigger bull dog later in life. It is really nice.... get it! Accurate, looks cool, only problem is the weight but you know what.. Its not that much of a problem. Besides... You gotta be Strong to play paintball. :]